Takuin sat in a Zen temple in Kyoto, waiting for a Zen Monk and an interesting conversation.
During his wait, he saw a little cockroach making its way across the floor. It was indecisive; move one way, go back, move one way, go back. He sat with this little creature for some time while waiting.

Then, a student of the temple walked into the room. He walked over to the roach and stepped on it.